That looks very nice. I will add it in due course.
Some of the addons there don't seem to be included on the main Celestia addon site, which is here.http://www.celestiamotherlode.net/
Some of my very earliest addons for OA are on the Motherlode, but they are a bit basic. John M Dollan's addons for OA are also included, and they are significantly better.